Topic: Tune the 4 banger or svap in a 4 liter?

[andpgud]

I have two options.
Swap in a 4 liter engine or tune the 4 banger.
Can you give me the pros and cons?

[sharpxmen]

keep the 4 cyl pros
- less money
- less work
- less gas

swap in a 6 cyl pros
- more power
- able to pass slow moving traffic (like trucks or agricultural equipment) uphill and wind from the front.

that being said there's not much tuning to do on the 4 cyl other than replacing what's busted (spark plugs/wires/cap/rotor, o2 sensor, catalytic converter, injectors and possibly fuel filter and/or pump).

[andpgud]

When I say tuning I mean bigger TB, electric fan, headers. More agressive cam that I allready have on the shelf

[stan98tj]

If you have the 4.0 already and it is in good shape, i say def swap it in. If you are going to have to buy it, I say forget it and go for a v8 swap which I understand is cheaper and easier than the 4.0l swap. We all love our 4bangers but I can't imagine any of us here TRULY passing up the opportunity for proper power. Have any of us really NEVER wondered why Jeep offered a 2.5l when the 4.0 was so damn good (easy now guys, I'm not bashing).
AS for gas consumption....that's debatable. They are quite close from the factory, if not the same. Further, with add ons, tires, armor etc, the 4banger is going to consume more pushing all that weight around.
Unless you're going to pull out the 4banger and strip it down to the block and rebuilt it into a monster, turbo or supercharged beast, I say swap in that 4.0.

[sharpxmen]

he's in Poland i think so a v8 being cheaper is not really the case there (or not as common as here)

same year 4.0L will always take more gas no matter what the factory claims are, now if you drive the 4 banger racing style (whatever the actual result is, you know what i mean) and the 4.0 like a baby then yes you can have different results

[stan98tj]

he's in Poland i think so a v8 being cheaper is not really the case there (or not as common as here)

same year 4.0L will always take more gas no matter what the factory claims are, now if you drive the 4 banger racing style (whatever the actual result is, you know what i mean) and the 4.0 like a baby then yes you can have different results

I understand your point, but from the basis of the power advantage I see the 4.0 a good opportunity for him. As for the gas, most of my wheeling buddies have 4.0s and are similarly built to mine, some more built than mine. Most of them get better gas mileage than me, the rest get just about the same, none get worse than me. I don't drive aggressively. Factory claims 18/19 for the 4.0l which is what it claims for the 2.5l.  Perhaps if you compare 2 bone stock wranglers, one 4.0 and one 2.5, if you baby the 2.5 you may be able to squeeze by the 4.0 and get better mileage but I'll be it will be close. However, I maintain that once you start building that 2.5l up with larger tires, a lift, bumpers, winch, armor etc, it will have to push harder to carry that weight and then will consume more or the same as a similar built 4.0l.

[VA_YJ]

keep the 4 cyl pros (additional)
- fewer speeding tickets
- less likely to trash a D35
- more room under the hood for extras (e.g., batteries, air compressors)

swap in a 6 cyl pros (additional)
- easier to hop up (4.6 liter stroker), more performance parts
- lots of 4.0 cherokees to rob parts off of
- stronger transmissions and transfer cases easy to swap (23 spline outputs) (e.g., Dana 300)